[PATCH 4/7] remoteproc: imx: Add i.MX8M support
Sascha Hauer
s.hauer at pengutronix.de
Mon Oct 5 05:53:43 EDT 2020
This adds support for the different i.MX8M SoCs to the i.MX rproc
driver. i.MX8MM and i.MX8MQ can be handled like the i.MX7D with a
different address space map. i.MX8MN and i.MX8MP are different though.
Unlike the other SoCs which have a Cortex-M4 Coprocessor these have
a Cortex-M7 Coprocessor. On these SoCs the TCM is only accessible when
the Coprocessor is already started. A bit in the IOMUX GPR register
space is needed to hold the CPU in wait mode until we uploaded the code
to the TCM.
Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
drivers/remoteproc/imx_rproc.c | 126 +++++++++++++++++++++++++++++++++
1 file changed, 126 insertions(+)
diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
index 86eba4fcd4..726e16d6d4 100644
--- a/drivers/remoteproc/imx_rproc.c
+++ b/drivers/remoteproc/imx_rproc.c
@@ -76,6 +76,7 @@ struct imx_rproc_att {
struct imx_rproc_dcfg {
const struct imx_rproc_att *att;
size_t att_size;
+ int (*rproc_init)(struct rproc *rproc);
int (*rproc_start)(struct rproc *rproc);
int (*rproc_stop)(struct rproc *rproc);
};
@@ -83,6 +84,7 @@ struct imx_rproc_dcfg {
struct imx_rproc {
struct device_d *dev;
struct regmap *regmap;
+ struct regmap *gpr;
struct rproc *rproc;
const struct imx_rproc_dcfg *dcfg;
struct imx_rproc_mem mem[IMX7D_RPROC_MEM_MAX];
@@ -139,6 +141,39 @@ static const struct imx_rproc_att imx_rproc_att_imx7d[] = {
{ 0x80000000, 0x80000000, 0x60000000, 0 },
};
+static const struct imx_rproc_att imx_rproc_att_imx8mn[] = {
+ /* dev addr , sys addr , size , flags */
+ { 0x00000000, 0x007e0000, 0x00020000, ATT_OWN }, /* ITCM */
+ { 0x00180000, 0x00180000, 0x00009000, 0 }, /* OCRAM_S */
+ { 0x00900000, 0x00900000, 0x00020000, 0 }, /* OCRAM */
+ { 0x00920000, 0x00920000, 0x00020000, 0 }, /* OCRAM */
+ { 0x00940000, 0x00940000, 0x00050000, 0 }, /* OCRAM */
+ { 0x08000000, 0x08000000, 0x08000000, 0 }, /* QSPI Code - alias */
+ { 0x10000000, 0x80000000, 0x0ffe0000, 0 }, /* DDR (Code) - alias */
+ { 0x20000000, 0x00800000, 0x00020000, ATT_OWN }, /* DTCM */
+ { 0x20180000, 0x00180000, 0x00008000, ATT_OWN }, /* OCRAM_S - alias */
+ { 0x20200000, 0x00900000, 0x00020000, ATT_OWN }, /* OCRAM */
+ { 0x20220000, 0x00920000, 0x00020000, ATT_OWN }, /* OCRAM */
+ { 0x20240000, 0x00940000, 0x00040000, ATT_OWN }, /* OCRAM */
+ { 0x40000000, 0x40000000, 0x80000000, 0 }, /* DDR (Data) */
+};
+
+static const struct imx_rproc_att imx_rproc_att_imx8mq[] = {
+ /* dev addr , sys addr , size , flags */
+ { 0x00000000, 0x007e0000, 0x00020000, 0 }, /* TCML - alias */
+ { 0x00180000, 0x00180000, 0x00008000, 0 }, /* OCRAM_S */
+ { 0x00900000, 0x00900000, 0x00020000, 0 }, /* OCRAM */
+ { 0x00920000, 0x00920000, 0x00020000, 0 }, /* OCRAM */
+ { 0x08000000, 0x08000000, 0x08000000, 0 }, /* QSPI Code - alias */
+ { 0x10000000, 0x80000000, 0x0ffe0000, 0 }, /* DDR (Code) - alias */
+ { 0x1ffe0000, 0x007e0000, 0x00020000, ATT_OWN }, /* TCML */
+ { 0x20000000, 0x00800000, 0x00020000, ATT_OWN }, /* TCMU */
+ { 0x20180000, 0x00180000, 0x00008000, ATT_OWN }, /* OCRAM_S */
+ { 0x20200000, 0x00900000, 0x00020000, ATT_OWN }, /* OCRAM */
+ { 0x20220000, 0x00920000, 0x00020000, ATT_OWN }, /* OCRAM */
+ { 0x40000000, 0x40000000, 0x80000000, 0 }, /* DDR (Data) */
+};
+
static int imx6sx_rproc_start(struct rproc *rproc)
{
struct imx_rproc *priv = rproc->priv;
@@ -179,6 +214,72 @@ static int imx7d_rproc_stop(struct rproc *rproc)
IMX7D_M4_STOP);
}
+#define IOMUXC_GPR22 0x58
+#define IOMUXC_GPR22_CM7_CPUWAIT BIT(0)
+
+static int imx8mn_cm7_wait(struct rproc *rproc, bool wait)
+{
+ struct imx_rproc *priv = rproc->priv;
+
+ return regmap_update_bits(priv->gpr,
+ IOMUXC_GPR22,
+ IOMUXC_GPR22_CM7_CPUWAIT,
+ wait ? IOMUXC_GPR22_CM7_CPUWAIT : 0);
+}
+
+static int imx8mn_rproc_start(struct rproc *rproc)
+{
+ struct imx_rproc *priv = rproc->priv;
+ int ret;
+
+ ret = regmap_update_bits(priv->regmap,
+ IMX7D_SRC_SCR,
+ IMX7D_M4_RST_MASK,
+ IMX7D_ENABLE_M4 | IMX7D_SW_M4C_RST);
+ if (ret)
+ return ret;
+
+ ret = imx8mn_cm7_wait(rproc, false);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int imx8mn_rproc_stop(struct rproc *rproc)
+{
+ struct imx_rproc *priv = rproc->priv;
+ int ret;
+
+ ret = imx8mn_cm7_wait(rproc, true);
+ if (ret)
+ return ret;
+
+ return regmap_update_bits(priv->regmap,
+ IMX7D_SRC_SCR,
+ IMX7D_M4_RST_MASK,
+ IMX7D_ENABLE_M4 | IMX7D_SW_M4C_RST | IMX7D_SW_M4C_NON_SCLR_RST);
+}
+
+static int imx8mn_rproc_init(struct rproc *rproc)
+{
+ struct imx_rproc *priv = rproc->priv;
+ int ret;
+
+ priv->gpr = syscon_regmap_lookup_by_compatible("fsl,imx8mp-iomuxc-gpr");
+ if (IS_ERR(priv->gpr))
+ return PTR_ERR(priv->gpr);
+
+ ret = imx8mn_cm7_wait(rproc, true);
+ if (ret)
+ return ret;
+
+ return regmap_update_bits(priv->regmap,
+ IMX7D_SRC_SCR,
+ IMX7D_M4_RST_MASK,
+ IMX7D_ENABLE_M4 | IMX7D_SW_M4C_RST);
+}
+
static const struct imx_rproc_dcfg imx_rproc_cfg_imx6sx = {
.att = imx_rproc_att_imx6sx,
.att_size = ARRAY_SIZE(imx_rproc_att_imx6sx),
@@ -193,6 +294,21 @@ static const struct imx_rproc_dcfg imx_rproc_cfg_imx7d = {
.rproc_stop = imx7d_rproc_stop,
};
+static const struct imx_rproc_dcfg imx_rproc_cfg_imx8mn = {
+ .att = imx_rproc_att_imx8mn,
+ .att_size = ARRAY_SIZE(imx_rproc_att_imx8mn),
+ .rproc_init = imx8mn_rproc_init,
+ .rproc_start = imx8mn_rproc_start,
+ .rproc_stop = imx8mn_rproc_stop,
+};
+
+static const struct imx_rproc_dcfg imx_rproc_cfg_imx8mq = {
+ .att = imx_rproc_att_imx8mq,
+ .att_size = ARRAY_SIZE(imx_rproc_att_imx8mq),
+ .rproc_start = imx7d_rproc_start,
+ .rproc_stop = imx7d_rproc_stop,
+};
+
static int imx_rproc_start(struct rproc *rproc)
{
struct imx_rproc *priv = rproc->priv;
@@ -391,6 +507,12 @@ static int imx_rproc_probe(struct device_d *dev)
goto err_put_rproc;
}
+ if (dcfg->rproc_init) {
+ ret = dcfg->rproc_init(rproc);
+ if (ret)
+ goto err_put_clk;
+ }
+
ret = rproc_add(rproc);
if (ret) {
dev_err(dev, "rproc_add failed\n");
@@ -408,6 +530,10 @@ err_put_rproc:
static const struct of_device_id imx_rproc_of_match[] = {
{ .compatible = "fsl,imx6sx-cm4", .data = &imx_rproc_cfg_imx6sx },
{ .compatible = "fsl,imx7d-cm4", .data = &imx_rproc_cfg_imx7d },
+ { .compatible = "fsl,imx8mm-cm4", .data = &imx_rproc_cfg_imx8mq },
+ { .compatible = "fsl,imx8mn-cm7", .data = &imx_rproc_cfg_imx8mn },
+ { .compatible = "fsl,imx8mp-cm7", .data = &imx_rproc_cfg_imx8mn },
+ { .compatible = "fsl,imx8mq-cm4", .data = &imx_rproc_cfg_imx8mq },
{},
};
--
2.28.0
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